
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:25 AM
micromass

1 
32,446 
This might be embarrasingly easy or impossible; I've been a computer programmer for too long since my statistics...

Jul511 02:40 AM
rabbyad

3 
5,815 
Hey,
I am trying to find the probability that exactly two people out of m have the same birthday. I know that the...

Jul1511 02:12 AM
ndrue

15 
15,380 
Hi everyone,
My data consists of road accidents and spatial covariates. Originally i wanted to apply an...

Jul1311 02:53 AM
adayao

7 
2,177 
I've been trying to figure out how to do a linear regression on data with asymmetric x and y error bars (different for...

Jul1311 06:53 AM
pmsrw3

11 
5,558 
I don't even know how to start this question:
I have 6 pairs of socks (12 socks) of different colors.
If I...

Jul1411 07:56 PM
julie9612

4 
3,013 
In proving :x=0\Longrightarrow x=0,the following indirect proof is offered:
Let x= 0 and suppose x\neq 0...

Jul511 04:05 PM
daveb

14 
2,042 
I'd like to know how to prove (or show that it is reasonable) that the probability that a random vector (X, Y) assumes...

Jul411 07:40 PM
ndrue

12 
1,866 
If all the exams have normal distribution will the average grades to student also be normal distributed?
I have...

Jul1111 08:45 AM
MaxManus

4 
1,622 
I'm going through the set theory material in the appendix of Knapp's Basic Algebra. I want to make sure that I...

Jul511 04:43 PM
TopCat

6 
2,477 
Let X be a nonempty set, and let S contain all countable subsets of X. Partially order S by inclusion. Let C be a...

Jul1111 09:19 AM
Josh Swanson

11 
4,159 
Today my grandfather told me a story, which he insists is true and which I believe he believes is true, which seems to...

Jul811 01:37 PM
Megaritz

6 
2,208 
My goal here is to at least approximately calculate the probability density function (PDF) given the moment generating...

Jul711 07:28 PM
bpet

6 
6,017 
The following problem came up in my work.
You have a tube, open at the top. Raindrops fall into the mouth of the...

Jul911 08:17 AM
pmsrw3

9 
1,947 
I have a discrete set of data. I'd like to visualize it probabilistically. Unfortunately, I focused in Num Methods in...

Jul611 11:14 AM
pmsrw3

2 
1,544 
Hi,
Why there is a half factor in the definition of the correlation of complex random variables, like:
...

Jul611 01:14 PM
S_David

4 
2,820 
Hi, it will be a very silly question, excuse me plz.
I am wondering whether
3/(sqrt(2pi delta^2))...

Jul1111 08:07 AM
wall_e

4 
2,501 
Dear all,
let's say I want to know the elasticity constant of a spring (k), so I measure several times different...

Jul811 01:10 PM
atat1tata

8 
2,449 
Hi there! I'm trying to prove that every Dedekind cut A has an additive inverse A such that A + (A)=0*. We've...

Jul711 08:51 AM
micromass

1 
1,644 
I have 6 years of data which has both a 3month and a 12month seasonality, it exhibits a trend and is very noisy.
...

Jul711 12:17 AM
Oxymoron

0 
710 
Hi, everybody
Let n_1 ~ Poisson ( \lambda_1 ) and n_2 ~ Poisson (\lambda_2).
Now define n=n_1n_2 . We...

Jul811 03:47 AM
sabbagh80

5 
1,953 
Hello,
I have a question regarding the likelihood ratio order of two distributions:
Is there a requirement that...

Jul711 05:16 PM
hadron23

0 
856 
Theorem: If "θ hat" is an unbiased estimator for θ AND Var(θ hat)>0 as n>∞, then it is a consistent estimator of θ....

Jul811 04:28 PM
kingwinner

4 
2,251 
Linear Spaces
Norms and inner products
Holder’s inequality
Minkowski’s inequality
Normed linear spaces...

Jul811 10:00 AM
micromass

1 
1,132 
suppose i have 2 bayesian networks....
a>b and c>d ie b depends on a and d depends on b
now...

Jul1011 05:41 PM
SW VandeCarr

3 
1,204 
The ABC manufacturing company purchases a certain part from two suppliers (A supplier & B supplier). The parts...

Jul911 12:23 PM
pmsrw3

8 
1,575 
Olbers' paradox states that if the universe is infinite, static and homogeneous then why is the night sky dark. Of...

Jul911 08:35 PM
pmsrw3

3 
1,817 
Hello y'all,
If I have n data points (xi, yi) each with error bars in both x and y (xi_err, yi_err), should I use...

Jul911 04:52 PM
pmsrw3

6 
2,902 
I believe that it is correct, and it concisely represents a concept I have never understood. It seems obvious to me...

Jul911 07:40 PM
pmsrw3

3 
1,183 
In a box with 80 tickets, 10 people buy 10 tickets each. If there are 4 winning tickets drawn at random find the...

Jul1011 05:40 AM
tinytim

1 
1,058 
Hi there,
I am thinking a question of finding the expectation of duplicate numbers (how many time any pair could be...

Jul1011 07:35 PM
bpet

1 
795 
Guys,
I'm taking real analysis starting with open, close, compact sets, and neighborhoods. Now I'm addict to rely...

Jul1111 10:58 AM
micromass

2 
1,373 
Is there a way to calculate/estimate how big a sample from a parent distribution would need to be for the distribution...

Jul1111 08:33 PM
bpet

2 
1,530 
Could someone please advise me how to put the integral from + to  infinity notation used $ exp{1/2(yx)^2(A^1) +...

Jul1311 01:54 PM
EmmaSaunders1

34 
3,041 
I'm wondering how conditional probability relates to concepts of sample space, observation space, random variable,...

Jul1511 08:18 AM
Rasalhague

6 
1,687 
Hi,
I will thank If somebody help me solving this problem.
Consider a random variable k_1 with the given pmf...

Jul1411 05:01 AM
sabbagh80

2 
1,932 
I have a set of data points {xi,yi} where each yi is a Gamma distributed variable where both the shape k and scale...

Jul1411 11:13 PM
bpet

6 
1,162 
What is the function that I get when I take a large sample from an exponential distribution (many values from the same...

Jul1511 08:22 AM
pmsrw3

7 
1,227 
A random variable is defined as a function from one set, called a sample space, to another, called an observation...

Jul1511 06:19 PM
micromass

9 
1,114 
Here, to further test my understanding, is an attempt to apply the measury theory definitions of a probability space...

Jul1511 07:02 PM
micromass

5 
2,637 
Given 4 axioms in real Nos:
1) 1x = x ,for all x
2) x+0 = x ,for all x
3) (x+y)z = xz+yz ,for all x,y,z
4)...

Jul1611 08:04 PM
evagelos

2 
895 